Alkylidene and Metalacyclic Complexes of Tungsten that Contain a

Dynamic Effects on J-Couplings Across Hydrogen Bonds in Proteins. [J. Am. Chem. Soc. 2003, 125, 644645]. Phineus R. L. Markwick,* Remco Sprangers, and Michael Sattler* Page 644. The version of this Communication published ASAP 12/24/2002 contained an error in the e-mail address of one of the authors (correct email address is [email protected]). A corrected version with an explanatory paragraph was posted on the Web 1/3/2003. Due to an error during the preparation of issue 3 of Vol. 125 (January 22, 2003), the uncorrected original version appeared in print and in the PDF rendition published on the Web 1/15/2003. The HTML rendition published the same day contained the corrected version. A revised PDF and HTML version correcting the error and containing this explanation was published on the Web 4/23/2003. JA0339854 10.1021/ja0339854 Published on Web 04/23/2003

Alkylidene and Metalacyclic Complexes of Tungsten that Contain a Chiral Biphenoxide Ligand. Synthesis, Asymmetric Ring-Closing Metathesis, and Mechanistic Investigations [J. Am. Chem. Soc. 2003, 125, 26522666]. W. C. Peter Tsang, Kai C. Hultzsch, John B. Alexander, Peter J. Bonitatebus, Jr., Richard R. Schrock,* and Amir H. Hoveyda Page 2655, 13A (TOC entry). The correct structure of the product of desymmetrizing compound 11 (Table 2 and the TOC graphic) is shown below. The stereochemistries of all three products shown in Table 2, as stated in the footnote to Table 2, are (R); all were drawn incorrectly with the (S) configuration.

JA033446Z 10.1021/ja033446z Published on Web 04/25/2003